Reactive sintering of tungsten-doped high strength ZrB2–SiC porous ceramics using metastable precursors

Effect of surface modification on silicon carbide particles with nanocrystalline spinel LZO for enhanced damping and mechanical property

“…It can be seen that there is no complex exothermic and endothermic peaks appeared on the DSC curves. For the SiC@ZrO 2 sample prepared by isothermal hydrolysis only one exothermic peak is observed at about 317°C and this peak is attributed to a phase transformation from amorphous ZrO 2 to t-ZrO 2 [35]. Further, for SiC@ZrO 2 sample prepared by chemical precipitation method one peak is at 309°C due to a phase transformation from amorphous ZrO 2 to t-ZrO 2 similarly, as well as some peaks are at 464°C and 1000°C where the phase transformation from t-ZrO 2 to m-ZrO 2 might be occurred [36].…”

Effects of refractory metal additives on diboride‐based ultra‐high temperature ceramics: A review

“…Moreover, an inhomogeneous (Zr,W)B 2‐x solid solution with core‐shell microstructure was found at 2000–2100°C, and the average grain size decreased gradually with the increase of W content, because the core‐shell structure (Zr,W)B 2‐x solid solution inhibited the grain growth during the sintering process, but WB with Zr dissolution promoted the densification of ZrB 2 ceramics at 2100°C by the assistance of W‐Zr‐B liquid phase. Because of the fine grain strengthening caused by W addition, the room temperature strength of ZrB 2 ceramics hot‐pressed at 2100°C increased with increasing W content from 314 MPa (0 vol.% W) to 716 MPa (3 vol.% W) and 720 MPa (5 vol.% W), as shown in Figure 1(d). Zhao et al 76 . also confirmed the formation of solid solution (Zr,W)B 2 in the ZrB 2 ‐SiC‐based ceramics.…”

Fiber reinforced porous (La1/5Nd1/5Sm1/5Gd1/5Yb1/5)2Zr2O7 ceramics with enhanced compressive strength

“…Therefore, it showed a challenging but valuable work to produce porous ceramics with both high porosity and high mechanical properties. As studied, reinforcement of the skeleton demonstrated the most effective way to improve the mechanical properties of porous ceramics 27,28 . There are many works about reinforcement of the dense ceramics, for instance, dispersion strengthening, fiber strengthening, solution strengthening, and fine‐grain strengthening 29,30 .…”

“…As studied, reinforcement of the skeleton demonstrated the most effective way to improve the mechanical properties of porous ceramics. 27,28 There are many works about reinforcement of the dense ceramics, for instance, dispersion strengthening, fiber strengthening, solution strengthening, and fine-grain strengthening. 29,30 Meanwhile the fiber reinforcement procedure is widely used and can remarkably improve the overall strength of the ceramics.…”